Rivet set



Eatented Apr, 23%, 1923.

UNITED s'rrss rfAT RICHARD HERVIG, or CHICAGO, ILLINOIS, nssreivonro AMERICAN can, Ann FOUNDRY COMPANY, or NEW Yonx, n. 3. n oonronarron or new JERSEY.

Application filed .Tune'10, 1920. Serial No; 388,052.

To all whom/it may concern:

Be it known that I, RICHARD 'HERVIG, re-

siding at Chicago, Cook County, State of Illinois, and being a citizen of theU'nited States, have invented certain new and useful Improvements in a Rivet Set, of whlch the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make 1 and to use the same, reference being had to the accompanying drawings, which illustrate the preferred form of the invention, though it is to' he understood that the inven tion is not limited to the exact details of construction shown and described, as it is proved rivet set With a part of the head of the rivet set and the retainer ring shown in section and the hammer barrel and retainer clip shown in dotted lines;

Figure 2 is a view in elevation of a modified form of my rivet set, a part of the head I of the rivet set and the retainer ring being shown in section; and

Figure 3 is a view similar to Fig. 2 with the retainer ring omitted.

It is the object of my invention to provide an improved rivet set for penumatic hammers that will be free from strains caused by the hardening of the rivet set, which will cool quickly and can be fitted to the retainer clips nowin common use. M

It has been found in practisethat where there is a sudden increase in the diameter of the metal where the head and shank of a rivet set join that strains are set up during the hardening'process that very often result in the fracture of the metal at this place. Further, ahead of this type contains more metal and is slow in cooling. I

My invention, accordingly, comprises a rivet set having a shank 1 adapted to be inserted in the barrel of the hammer 2, shown dotted in Fig. 1, and having an enlarged head 3 provided with a recess 4 to receive the rivet head. The head 3 is rounded, having its surface curved in two directions and joined to the surface of the shank by a'surface curved so that a sudden enlarge: ment of the diameter of the metal in the head is avoided. The shank 1 is also provided with a low' rounded shoulder or integral ring 5 spaced from the head that engages the end of the hammer barrel 2 and serves to limit the insertion of the shank in the hammer barrel. Surrounding the shank 1 between the shoulder 5 and the head 3 is a retainer ring 6 having a shoulder 7 engaged by'the retainer clip 8. In assembling the ring on the rivet set shank, the bore of the ring is made sufiiciently large to slip ov r the shoulder 5 and the ring is then squeezed to fit the shankwhile still hot. Shrinkage, as the ring cools, causes the ring to be securely fastened on the shank.

In the modification shown in Figs. 2 and 3, a plurality of the rounded shoulders 5 are provided on the shank 1, all of the collars being engaged. by the retainer ring 6 and serving to hold the ring in place when the ringhas been squeezed to fit the shank.

What I claim is: s

1. A rivet set having an enlarged rounded head, the surface of which is curved in two directions, a shank and a low rounded shoulder on said shank.

2. A rivet set having an enlarged rounded head, the surface of which is curved in two directions, a shank, a low rounded shoulder on said shank and. a retainer ring on said shank engagingsaid head and shoulder.

8. The method of forming a rivet set, consisting in taking a section of metal having a riveting head and a shank, placing a heated collar around said shank and permitting the collar to shrink thereon thus fixing said collar to the said shank. I 4.- In a hardened steel tool comprising head and shank differing in size and expending abruptly at'the union of the head and shank, the combination of two separate pieces one thereof comprising all of the head exceeding the size of the shank immediately adjacent the shank and gradually diminishing in size toward the remote end of the head and the other piece comprising the shank of. the tool and the remainder of the head of the tool. I i

5. In a hardened steel tool comprising head and shank difi'ering in size and expanding abruptly at the union of the head shank of the tool at the union of the said head and shank and flaring gradually upon the inside of the same to a thin edge at the other end of the ring and the other piece comprising all of the shank of the tool and the remainder of the head formed integral and with that part of the said remainder of the head which is adjacent the shank shaped to conform with the insideof the said ring.

6. Arivet set comprising a section of metal having a shank of uniform diameter and a suitable riveting head, at one end, an annular groove in the shank in proximity to the said head and a collar fixedly secured in said groove.

7. The method of forming a rivet set consisting in taking a section of metal having a riveting head at one end and a shank of substantially uniform diameter, forming a groove in the shank in proximity to the head, placinga heated collar around said groove and permitting the collar to shrink therein thus securely fixing said collar to the said shank.

8. A rivet set comprising a section of metal having a shank of substantially uniform diameter and a suitable riveting head at one end thereof, and a collar on said shank in proximty to said head.

9. A die of the class described comprising a head portion, a shank integral with the head portion, the said shank being of uniform transverse section throughout its length whereby an equal cooling ofthe die is obtained during the tempering process, and a reinforcing sleeve embracing the shank and abutting the head portion.

In Witness whereof I have hereunto set my hand in the presence of two Wit-1168868,

' R. W. SMITH,

JOSEPHINE MITCHELL. 

